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Most common first and second-generation antihistamines
| First generation | Second generation |
|---|---|
| Diphenhydramine | Cetirizine |
| Clemastine | Levocetirizine |
| Clorphenamine | Ketotifen |
| Dimetindene | Loratadine |
| Hydroxyzine | Desloratadine |
| Promethazine | Rupatadine |
| Alimemazine | Ebastine |
| Cyproheptadine | Bilastine |
| Fexofenadine |
